{
  "bibcode": "2018GCN.22323....1B",
  "body": "Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC), William\nH. Lee (UNAM), Michael G. Richer (UNAM), Ori Fox (STScI), J. Xavier\nProchaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (UVI), Eleonora\nTroja (GSFC), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz (UCSC), Jes��s\nGonz��lez (UNAM), Carlos Rom��n-Z����iga (UNAM), Harvey Moseley (GSFC), John\nCapone (UMD), V. Zach Golkhou (U. Wash.), and Vicki Toy (UMD) report:\n\nWe observed the field of GRB 180111A (Lien, et al., GCN 22318) with the\nReionization and Transients Infrared Camera (RATIR; www.ratir.org) on the\n1.5m Harold Johnson Telescope at the Observatorio Astron��mico Nacional on\nSierra San Pedro M��rtir from 2018/01 12.21 to 2018/01 12.56 UTC (12.35 to\n20.68 hours after the BAT trigger), obtaining a total of 5.31 hours\nexposure in the r and i bands and 2.22 hours exposure in the Z and Y bands.\n\nWe find a source within the Swift-XRT error circle (Evans, et al., 22319).\nIn comparison with the SDSS DR9 and 2MASS catalogs, we measure:\n\n r = 20.90 +/- 0.10\n i = 20.41 +/- 0.10\n Z = 20.61 +/- 0.15\n Y = 20.41 +/- 0.15\n\nThese magnitudes are in the AB system and are not corrected for Galactic\nextinction in the direction of the GRB.  We note that there is an r=22.7\nmag SDSS source, perhaps the host galaxy, within the XRT error region and\nat a position consistent with our source position.\n\nWe thank the staff of the Observatorio Astron��mico Nacional in San Pedro\nM��rtir.",
  "circularId": 22323,
  "createdOn": 1515771390000,
  "email": "natbutler@asu.edu",
  "subject": "GRB 180111A: RATIR Optical and NIR Observations",
  "submitter": "Nat Butler at Az State U  <natbutler@asu.edu>",
  "eventId": "GRB 180111A"
}